Climate change can do the same thing for an economy as a war. It was WW2 that brought the US economy back from the great depression, because people had stuff to make, stuff to rebuild. Same thing for a changing climate. Construction business will boom. New levees to build, new houses to build away from the coasts, repairing flooded and hurricaned areas and so on. Preventing the change is very unlikely, but adaptation will be the new priority. It won't be based on predictions, just adapting to what already happened. Just let mother nature run its course and deal with it.